Fracturing of an Euler-Bernoulli beam in coal mine pillar extraction

The paper models the first stage of the process of pillar extraction in a coal mine. The problem of understanding how a coal mine roof collapses after secondary cutting of the supporting pillars to create small supporting snooks is considered. The fracture of the roof is considered when a set of sno...

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Hlavní autoři: Please, C, Mason, D, Khalique, C, Ngnotchouye, J, Hutchinson, A, van der Merwe, J, Yilmaz, H
Médium: Journal article
Jazyk:English
Vydáno: 2013
Popis
Shrnutí:The paper models the first stage of the process of pillar extraction in a coal mine. The problem of understanding how a coal mine roof collapses after secondary cutting of the supporting pillars to create small supporting snooks is considered. The fracture of the roof is considered when a set of snooks have failed and the roof must support itself between two pillars. Models that account for the relative importance of the overburden weight on the roof and the compressive stresses in the roof are examined using a simple strut and beam theory. © 2013 Elsevier Ltd.